bevy/examples/2d/transparency_2d.rs

//! Demonstrates how to use transparency in 2D.
//! Shows 3 bevy logos on top of each other, each with a different amount of transparency.

use bevy::prelude::*;

fn main() {
    App::new()
        .add_plugins(DefaultPlugins)
        .add_startup_system(setup)
        .run();
}

fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
    commands.spawn_bundle(Camera2dBundle::default());

    let sprite_handle = asset_server.load("branding/icon.png");

    commands.spawn_bundle(SpriteBundle {
        texture: sprite_handle.clone(),
        ..default()
    });
    commands.spawn_bundle(SpriteBundle {
        sprite: Sprite {
            // Alpha channel of the color controls transparency.
            color: Color::rgba(0.0, 0.0, 1.0, 0.7),
            ..default()
        },
        texture: sprite_handle.clone(),
        transform: Transform::from_xyz(100.0, 0.0, 0.0),
        ..default()
    });
    commands.spawn_bundle(SpriteBundle {
        sprite: Sprite {
            color: Color::rgba(0.0, 1.0, 0.0, 0.3),
            ..default()
        },
        texture: sprite_handle,
        transform: Transform::from_xyz(200.0, 0.0, 0.0),
        ..default()
    });
}